Pulse Shaping Improves Efficiency of Soft X-Ray Harmonic Generation

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Abstract
As physicists seek to probe and control phenomena on increasingly smaller length scales, coherent sources of radiation in the extreme ultraviolet(EUV or XUV, 10–100 nm) and soft x‐ray (1‐30 nm) regions of the spectrum are increasingly in demand. The semiconductor industry, for example, is eagerly pursuing EUVsources that can generate smaller linewidths beyond the limits of optical lithography. And femtosecond chemistry could benefit from light sources capable of producing very short pulses at small wavelengths. Delicate sculpting of femtosecond laser pulses can yield dramatic effects in nonlinear light‐atom interactions.

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